ASTROSAT CZTI

Data Quality Report

Orbit 22850

Creation date: 2024-06-27T18:46:35.249028
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1C05_001T01_9000003374_22850cztM0_level2.evt modeM0/AS1C05_001T01_9000003374_22850cztM0_level2_quad_clean.evt
Size (bytes)1,334,943,360322,151,040
Size1.2 GB 307.2 MB
Events in quadrant A8,825,3462,210,923
Events in quadrant B8,691,9382,223,846
Events in quadrant C8,028,3382,118,853
Events in quadrant D13,707,8172,004,584

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03560
B03560
C03560
D03560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0378660
B0371740
C0355910
D0527630

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A173941170.672646%
B173951941.115263%
C173951871.075022%
D1739513667.852831%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 18699 17397 0 0 0.00% 0.00%
B 18700 17398 11 11 0.06% 0.06%
C 18700 17398 3 3 0.02% 0.02%
D 18700 17397 1019 1019 5.45% 5.86%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 11 47 754365 1820.14 2055 2013 413.3
A 13 252 112923 268.32 2055 2013 413.3
A 13 254 32821 74.53 2055 2013 413.3
B 0 190 424000 1101.53 2052 2000 383.1
B 0 189 59565 150.26 2052 2000 383.1
B 4 21 57798 145.65 2052 2000 383.1
C 14 238 310840 675.86 1962 1972 457.0
C 7 247 44412 92.87 1962 1972 457.0
C 2 16 17214 33.35 1962 1972 457.0
D 1 52 3624002 7686.12 1934 1877 471.3
D 1 239 1443301 3058.69 1934 1877 471.3
D 2 152 397885 840.33 1934 1877 471.3

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter